Pouch film supply device for secondary batteries

Abstract

The pouch film supplying device for secondary batteries of the present invention includes a plurality of first guide rollers that are installed at a distance between a pouch film input section and a discharge section, guide the pouch film, and have one side fixedly supported, a plurality of second guide rollers that are installed at a distance below the first guide rollers between the pouch film input section and the discharge section, and guide the pouch film, and a tilt measuring member that is provided on the other side of the first guide rollers and measures at least one of the up-down tilt and the left-right tilt of the first guide roller.

Description

[Technical field]

[0001] The present invention relates to a pouch film supplying device for a secondary battery.

[0002] More specifically, the present invention relates to a pouch film supplying device that can prevent the pouch film from meandering by measuring the inclination of a guide roller that guides the pouch film, managing the inclination of the guide roller, and adjusting the inclination when necessary.

[0003] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0166330 dated December 2, 2022, and all contents disclosed in the documents of that Korean patent application are incorporated herein by reference. [Background technology]

[0004] A pouch-type secondary battery is manufactured by housing an electrode assembly in a pouch-type battery case formed from a pouch film.

[0005] The pouch-type battery case is easily deformable and can be manufactured in various shapes, and is lightweight, which can increase the energy density per unit weight of the battery. The pouch film may include an outer coating layer, a metal barrier layer, and an inner sealant layer.

[0006] FIG. 1 shows a typical pouch-type battery case molding apparatus.

[0007] As shown in the figure, a pouch film 1 is supplied to a pouch forming section 20 by a pouch film supplying device 10 equipped with a number of guide rollers R1, R2, R3, and formed into a pouch-shaped case 2 of a predetermined shape in the pouch forming section 20.

[0008] In order to improve the processing precision of the pouch-type case in the pouch forming unit 20, the pouch film 1 supplied to the pouch forming unit 20 must maintain a correct path while traveling. If the pouch film travels in a meandering manner, defects will occur in the pouch-type case 2 processed in the pouch forming unit 20.

[0009] However, the upper guide rollers among the multiple guide rollers provided in the pouch film supplying device 10 are of the cantilever type, and only one side is fixed and supported, so there is a problem that the roller part on the other side, which is not fixed and supported, bends downward. There is also a problem that the extension direction of the roller is tilted to the left and right. That is, the guide rollers are tilted in the up-down or left-right direction, and the degree of this tilt differs slightly for each guide roller. In this case, the running path of the pouch film 1 guided along the multiple guide rollers becomes uneven. As a result, the pouch film supplied through the pouch film supplying device 10 runs in a meandering manner, increasing the possibility of defects occurring in the pouch forming unit 20.

[0010] On the other hand, an event may occur in a cutting section or a forming section downstream of the pouch film supplying device, and a series of pouch film processing steps may be interrupted. Alternatively, the above processing steps may be interrupted to change the pouch film. In this case, the subsequent pouch film supplying steps are all interrupted, which causes a problem of reduced work productivity. In this case, if the pouch film supplying device can ensure a sufficient pouch film travel path, even if an event occurs in a subsequent processing step, the time required for the travel can be secured to ensure maintenance time or pouch film replacement time in the subsequent steps.

[0011] Therefore, there is a need for the development of technology that can manage the inclination of the guide rollers in a pouch film supplying device and adjust it uniformly.

[0012] In addition, there is a demand for the development of a technology that can ensure the continuity of the subsequent process and increase work productivity even if a part of the pouch film supply and processing process is interrupted. [Prior art documents] [Patent documents]

[0013] [Patent Document 1] Korean Patent Publication No. 10-2022-0092310 Summary of the Invention [Problem to be solved by the invention]

[0014] The present invention has been devised to solve the above-mentioned problems, and aims to measure and monitor the inclination of the guide roller that guides the pouch film, thereby managing the inclination of the guide roller so as to prevent the pouch film from meandering.

[0015] Another object of the present invention is to provide a pouch film supplying device that can reliably prevent the pouch film from meandering by adjusting the inclination of the guide rollers based on the measured inclination.

[0016] Another object of the present invention is to provide a pouch film supplying device that can adjust the travel path of the pouch film by raising the guide rollers, thereby ensuring maintenance time even if a problem occurs in the pouch film processing process, etc., and allowing the pouch film supplying process to be performed without interrupting the process. [Means for solving the problem]

[0017] To solve the above problems, the pouch film supplying device for secondary batteries of the present invention includes a plurality of first guide rollers that are installed at a distance between a pouch film input section and a discharge section, guide the pouch film, and have one side fixedly supported, a plurality of second guide rollers that are installed at a distance below the first guide rollers between the pouch film input section and the discharge section, and guide the pouch film, and a tilt measuring member that is provided on the other side of the first guide roller and measures at least one of the up-down tilt and the left-right tilt of the first guide roller.

[0018] The pouch film can be guided alternately by the first guide roller and the second guide roller to form a zigzag running path between the pouch film input section and the pouch film discharge section.

[0019] Both side portions of the second guide rollers may be fixedly installed under the first guide rollers, and at least one of the first guide rollers may be installed to be movable up and down relative to the second guide rollers.

[0020] The first guide roller may include a roller portion extending across a guide direction of the pouch film to guide the pouch film, bearing portions installed on both sides of the roller portion, a first extension rod protruding from the bearing portions to one side of the first guide roller and fixedly supported, and a second extension rod protruding from the other side of the first guide roller.

[0021] The tilt measuring member may be mounted on the second extension rod.

[0022] The inclination measuring member may include at least one of a first inclination measuring member that measures the up-down inclination of the first guide roller, and a second inclination measuring member that measures the left-right inclination of the first guide roller.

[0023] The pouch film supplying device of the present invention may further include an inclination adjustment member that adjusts at least one of the up-down inclination and the left-right inclination of the first guide roller.

[0024] The pouch film supplying device of the present invention may further include a support frame installed below the first guide roller in parallel with the extension direction of the first guide roller, one side of which is fixed and supported on the same side as the one side of the first guide roller, and the other side of which supports the other side of the first guide roller.

[0025] The tilt adjustment member may be located on the other side of the support frame.

[0026] An upward extension bent upward toward the first guide roller may be provided at an end of the other side of the support frame, and a mounting groove in which an extension rod of the first guide roller is placed may be provided at an upper portion of the upward extension.

[0027] In one embodiment, a height adjustment bolt may be installed through the upward extension at the bottom of the installation groove to support the other end of the first guide roller in the vertical direction and adjust the height.

[0028] In another embodiment, a left / right inclination adjustment bolt may be installed through the left / right side walls of the upward extension part of the installation groove to support the other side end of the first guide roller in the left / right direction and adjust the position in the left / right direction.

[0029] The pouch film supplying device of the present invention may further include a monitoring unit connected to the inclination measuring member and monitoring at least one of the up-down inclination and the left-right inclination of the first guide roller measured by the inclination measuring member, and an inclination adjusting member adjusting at least one of the up-down inclination and the left-right inclination of the first guide roller, whereby, when the up-down inclination or the left-right inclination of the first guide roller monitored by the monitoring unit falls outside a set range, at least one of the up-down inclination and the left-right inclination of the first guide roller may be adjusted by the inclination adjusting member.

[0030] In another embodiment, the pouch film supplying device for secondary batteries includes a lift frame to which one side of at least one of the plurality of first guide rollers is fixedly supported, a drive unit for raising and lowering the lift frame, and a lift guide extending in the vertical direction for guiding the lifting and lowering movement of the lift frame, and as the lift frame is raised and lowered, the vertical distance between the first guide roller and the second guide roller varies, thereby adjusting the length of the pouch film guided between the first guide roller and the second guide roller.

[0031] When a process subsequent to the pouch film discharge section is interrupted or delayed, the control section can raise the lift frame to increase the vertical distance between the first guide roller and the second guide roller, thereby increasing the travel path of the pouch film guided between the first guide roller and the second guide roller. Effect of the Invention

[0032] According to the present invention, the vertical or horizontal inclination of the first guide roller that supplies the pouch film can be measured, and the perpendicularity and parallelism of the first guide roller can be monitored and effectively controlled.

[0033] Moreover, the above-mentioned vertical inclination or horizontal inclination can be adjusted within a set range, and the pouch film can be reliably prevented from meandering.

[0034] In addition, by raising the first guide roller and adjusting the travel path of the pouch film, maintenance time can be secured even if a problem occurs in the pouch film processing process, etc. This allows the pouch film supply process to be performed without interruption, greatly improving work productivity. [Brief description of the drawings]

[0035] [Figure 1] FIG. 1 is a schematic diagram of a conventional pouch-type battery case molding device. [Diagram 2] FIG. 1 is a schematic diagram of a pouch film supplying device for a secondary battery according to a first embodiment. [Diagram 3] 1 is a schematic view of a main part of a pouch film supplying device for a secondary battery according to a first embodiment. FIG. [Figure 4] 4A and 4B are a front cross-sectional view and a side cross-sectional view of a first guide roller. [Diagram 5] 11 is a schematic diagram showing a process of adjusting the up and down inclination of a first guide roller. FIG. [Figure 6] 3 is a schematic diagram showing a process in which a pouch film is supplied by the pouch film supplying device for a secondary battery of the first embodiment. FIG. [Figure 7] FIG. 11 is a schematic diagram of a pouch film supplying device for a secondary battery according to a second embodiment. [Figure 8] 6 is a schematic view of a main part of a pouch film supplying device for a secondary battery according to a second embodiment. FIG. [Figure 9] 11 is a schematic diagram showing a process of adjusting the left and right inclination of the first guide roller. FIG. [Figure 10] FIG. 11 is a schematic view of a main part of a pouch film supplying device for a secondary battery according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0036] The present invention will be described in detail below. Before that, the terms and words used in the specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted as meanings and concepts that are consistent with the technical idea of ​​the present invention based on the principle that an inventor can appropriately define the concept of a term to best describe his own invention.

[0037] In this application, the terms "comprise" and "have" are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, and may be understood as not precluding the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof. In addition, when a layer, film, region, plate, or other part is described as being "on" another part, this includes not only the case where it is "directly on" the other part, but also the case where there is another part in between. Conversely, when a layer, film, region, plate, or other part is described as being "under" another part, this includes not only the case where it is "directly under" the other part, but also the case where there is another part in between. In addition, in this application, being "on" may include not only the case where it is located on the top, but also the case where it is located on the bottom.

[0038] The present invention will be described in detail below.

[0039] The pouch film supplying device for secondary batteries of the present invention includes a first guide roller, a second guide roller, and an inclination measuring member.

[0040] The first guide roller and the second guide roller are rollers that can increase or decrease the travel path of the pouch film by changing the direction of the pouch film and guiding it. A plurality of the first guide rollers and the second guide rollers are installed between the pouch film input section and the discharge section.

[0041] The pouch film input section is a section where the pouch film is introduced into the first guide roller or the second guide roller. When the pouch film supplying device includes an external housing, the pouch film input section may be an input port formed through the external housing. Alternatively, when the pouch film supplying device includes a frame, the pouch film input section may be an open space between the edges of the frame. Alternatively, when the pouch film supplying device is installed in an open location without a housing or frame, the pouch film input section may simply be an open space where the pouch film is introduced.

[0042] The pouch film discharge section is a section where the pouch film is guided from the first guide roller or the second guide roller and discharged toward another subsequent process section. When the pouch film supplying device includes an external housing, the pouch film discharge section may be an outlet formed through the external housing. Alternatively, when the pouch film supplying device includes a frame, the pouch film discharge section may be an open space between the edges of the frame. Alternatively, when the pouch film supplying device is installed in an open location without a housing or frame, the pouch film discharge section may simply be an open space where the pouch film is discharged.

[0043] The shapes of the pouch film input portion and the discharge portion are not limited to those described above, and may be variously changed according to the shape of a housing surrounding the pouch film supplying device.

[0044] A plurality of first guide rollers are installed between the pouch film input section and the discharge section, and the plurality of first guide rollers are installed at a predetermined interval. The first guide roller is a cantilever type roller having one side fixed and supported. The one side of the guide roller may be fixed and installed on a fixed frame or a movable frame. Due to the installation structure of the first guide roller, the load of the first guide roller is concentrated on the one side. In order to distribute or support the load, the fixed frame or the movable frame may be installed on a fixed structure such as an installation wall. Since the first guide roller is a cantilever type, the other side of the first guide roller, which is not fixed and supported, may gradually bend downward by repeatedly guiding the pouch film. That is, the vertical inclination of the first guide roller varies. "Vertical inclination" refers to the degree to which the first guide roller is inclined upward or downward with respect to the horizontal direction. As the other side of the first guide roller bends downward, the upward inclination of the first guide roller gradually decreases and the downward inclination gradually increases. Since the degree of downward bending differs depending on each first guide roller, the upward or downward inclination differs slightly for each first guide roller. If the vertical inclination is out of the set range, meandering occurs during the running of the pouch film. Therefore, as described below, it is necessary to measure and monitor the vertical inclination of the first guide roller. In addition, the vertical inclination of the first guide rollers can be adjusted within a set range according to the monitoring result. Ideally, the vertical inclination of the first guide roller can be set to 0 and the first guide roller can be aligned completely horizontally. However, in the present invention, the first guide roller does not necessarily have to be maintained strictly horizontal. For example, the first guide roller may have a vertical inclination relatively close to horizontal within a range in which meandering of the pouch does not occur. In other words, it is sufficient to manage the inclination angle of the first guide roller so that it falls within the set vertical inclination range. What is more important is to uniformly manage the vertical inclination of the first guide rollers.

[0045] In addition, since the first guide roller is a cantilever type, the other side of the first guide roller, which is not fixed and supported, may be biased in the left-right direction by repeatedly guiding the pouch film. That is, the left-right inclination of the first guide roller varies. "Left-right inclination" refers to the degree to which the first guide roller is inclined left or right with respect to the vertical direction. Since the degree to which the other side of the first guide roller is displaced left or right varies, such left-right inclination differs slightly for each first guide roller. If the left-right inclination also deviates from a set range, meandering occurs during the running of the pouch film. Therefore, it is necessary to measure and monitor the left-right inclination of the first guide roller. In addition, the left-right inclination of the multiple first guide rollers may be adjusted within a set range according to the monitoring result. Ideally, the left-right inclination of the first guide roller may be set to 0, and one side and the other side of the first guide roller may be positioned so as to completely match the vertical direction. However, the object of the present invention is not limited thereto, and for example, the first guide roller may have a left-right inclination relatively close to 0 within a range in which meandering running of the pouch does not occur. What is more important is to maintain uniform parallelism of the first guide rollers by uniformly managing the left and right inclination of the first guide rollers.

[0046] A plurality of second guide rollers are installed between the pouch film input section and the discharge section, and the plurality of second guide rollers are installed at a predetermined interval. The second guide roller is installed below the first guide roller. Thus, the pouch film is alternately guided by the upper first guide roller and the lower second guide roller. Since the pouch film is repeatedly guided by the upper and lower first and second guide rollers, the pouch film runs in a zigzag pattern between the pouch film input section and the discharge section. By forming a long zigzag running path, the pouch film can run along a longer path within the same installation space. The second guide roller can be installed at the bottom of the space between two adjacent first guide rollers installed at the top. Conversely, the first guide roller can be installed at the top of the space between two adjacent second guide rollers installed at the bottom. As a result, the pouch film alternately guided by the first guide roller and the second guide roller can effectively run in a zigzag pattern.

[0047] Both sides of the second guide roller are fixed to the lower part of the first guide roller. For example, both sides of the second guide roller may be fixed to a fixture installed at the bottom. Since the second guide roller is stably supported by the bottom, the pouch film can also proceed from the pouch film input part to the pouch film discharge part while stably maintaining the zigzag shape.

[0048] Depending on the number of first and second guide rollers, the pouch film that is first input from the pouch film input section may be guided by the first guide roller or the second guide roller. For example, if the number of first guide rollers is greater than the number of second guide rollers, the pouch film may be guided first by the first guide roller. In addition, the pouch film that is guided to the pouch film discharge section may also be guided by the first guide roller or the second guide roller.

[0049] Alternatively, other guide rollers may be disposed before or after the space in which the first and second guide rollers are disposed. For example, a separate guide roller may be disposed in the space between the pouch film input section and the first and second guide rollers or in the space between the pouch film discharge section and the first and second guide rollers to adjust the discharge direction of the pouch film.

[0050] The first and second guide rollers may be driven rollers or drive rollers.

[0051] The first guide roller and the second guide roller include a roller portion extending transversely to a guide direction to guide the pouch film, and the pouch film may be guided while riding over the roller portion to change its direction.

[0052] A shaft extending in the extension direction of the roller unit is built into the center of the roller unit. The shaft and the roller unit are integrally coupled to each other and can be rotated together by the rotation of the shaft or the rotation of the roller unit. When the shaft is connected to a driving unit and rotated, the first guide roller and the second guide roller can be driving rollers. When the shaft is passively rotated by the rotation of the roller unit, the first guide roller and the second guide roller are driven rollers.

[0053] Bearing units are installed on both sides of the roller unit. The bearing units may be, for example, radial bearing units in which bearings are located in a retainer unit between an outer ring and an inner ring. The shaft is inserted into the inner ring and can rotate relative to the outer ring.

[0054] Extension rods may be provided protruding from an outer ring of the bearing unit to one side and the other side of the first guide roller. The outer ring of the bearing unit does not rotate despite the rotation of the roller unit. Therefore, one side of the first guide roller may be fixedly supported by fixedly installing the extension rod protruding from the outer ring of the bearing unit. Specifically, a first extension rod protruding from the outer ring of the bearing unit to one side of the first guide roller may be fixedly supported. The first extension rod may be fixedly coupled to a fixed frame or a movable frame.

[0055] Also, a second extension rod may be provided that protrudes from the outer ring of the bearing part to the other side of the first guide roller. The second extension rod also does not rotate despite the rotation of the roller part. A tilt measuring member, which will be described later, may be installed on the second extension rod. Also, the second extension rod may be supported by another support frame of a cantilever type.

[0056] If necessary, the support frame may be provided with an inclination adjustment member, which will be described later.

[0057] Similar to the first guide roller, the second guide roller may also include a first extension rod and a second extension rod protruding from bearing portions (outer rings) on both sides of the roller portion.

[0058] The first and second extension rods provided on both sides of the second guide roller may be fixedly coupled to a fixture installed on the bottom, for example, so that both sides of the second guide roller may be stably supported by the bottom and the pouch film may be stably guided.

[0059] The present invention further includes an inclination measuring member provided on the other side of the first guide roller for measuring at least one of the up-down inclination and the left-right inclination of the first guide roller.

[0060] As described above, the inclination measuring member may be installed on a non-rotating portion of the first guide roller, for example, on a second extension rod extended from an outer ring of a bearing part installed on the other side of the roller part, so that the inclination measuring member can stably measure the up-down inclination or left-right inclination of the first guide roller.

[0061] The inclination measuring member may be an inclination sensor that measures the degree of inclination (inclination) with respect to a reference plane. The inclination sensor measures the inclination angle of the measurement target surface by calculating the inclination angle from the behavior of a liquid or a pendulum due to gravity. Alternatively, a digital level gauge may be used as the inclination measuring member. The digital level gauge has a built-in bubbler and can easily express the inclination of the measurement target surface by converting it into a numerical value according to the change in the position of the bubble according to the measurement target surface. However, the inclination measuring member is not limited to the above-mentioned one, and it goes without saying that other types of inclination measuring members may be used as long as they can suitably measure the up-down inclination or left-right inclination of the first guide roller.

[0062] The inclination measuring member may include at least one of a first inclination measuring member that measures the up-down inclination of the first guide roller, and a second inclination measuring member that measures the left-right inclination of the first guide roller.

[0063] The pouch film supplying device of the present invention may further include an inclination adjustment member that adjusts at least one of the up-down inclination and the left-right inclination of the first guide roller.

[0064] In addition, the pouch film supplying device of the present invention is configured to be able to raise and lower the multiple first guide rollers, and can adjust the length of the pouch film that is stretched and guided between the first guide roller and the second guide roller.

[0065] Specific configurations and detailed components of the pouch film supplying device will be described in detail below with reference to the drawings and the following embodiments.

[0066] (First embodiment) FIG. 2 is a schematic diagram of the pouch film supplying device for secondary batteries in the first embodiment, FIG. 3 is a schematic diagram of the main parts of the pouch film supplying device for secondary batteries in the first embodiment, FIG. 4 is a front cross-sectional view and a side cross-sectional view of the first guide roller, FIG. 5 is a schematic diagram showing the process of adjusting the up and down inclination of the first guide roller, and FIG. 6 is a schematic diagram showing the process of pouch film being supplied by the pouch film supplying device for secondary batteries in the first embodiment.

[0067] As shown in FIG. 2, the pouch film supplying device 100 for secondary batteries of this embodiment includes a frame F in the shape of a frame.

[0068] The frame F may be installed on a wall W of a factory building. In FIG. 1, the frames F are installed on the left and right sides of the supply device 100, but a frame may also be installed on the front side. The pouch film 1 is supplied to and discharged from the open space inside the frames of the left and right frames F. In this embodiment, the pouch film 1 advances from the right side to the left side. Therefore, the open space inside the frame of the right frame F becomes the pouch film input section I, and the open space inside the frame of the left frame F becomes the pouch film discharge section O.

[0069] A first guide roller 110 and a second guide roller 120 are installed above and below in the space between the left and right frames F. However, some of the guide rollers may be disposed outside the frames F depending on the running path of the pouch film 1. In FIG. 2, the rightmost second guide roller 120 is disposed outside the right frame F.

[0070] A plurality of second guide rollers 120 are installed at a predetermined interval from right to left between the pouch film input part I and the discharge part O. Both sides of the second guide roller 120 are fixedly coupled to a fixing jig 160, which is fixedly installed at the bottom. That is, both sides of the second guide roller 120 are fixedly installed below the first guide roller 110, so that the pouch film 1 can be stably guided.

[0071] A plurality of first guide rollers 110 are installed at predetermined intervals above the second guide rollers 120. The first guide rollers 110 are also installed between the pouch film input part I and the discharge part O from right to left along the traveling direction of the pouch film.

[0072] As shown in FIG. 6, the pouch film 1 can be guided alternately by a first guide roller 110 and a second guide roller 120 to form a zigzag running path between a pouch film input section I and an output section O.

[0073] Both sides of the second guide roller 120 are fixedly installed under the first guide roller 110, while all or a part of the first guide roller 110 may be installed to be able to rise and fall relative to the second guide roller 120. In FIG. 2, six of the total eight first guide rollers 110 are installed to be able to rise and fall. When the first guide rollers 110 rise and fall, the distance between the first guide roller 110 and the second guide roller 120 changes, so that the length of the pouch film 1 guided by being stretched between the first guide roller and the second guide roller can be adjusted.

[0074] Unlike the second guide roller 120, which has both sides fixed, the first guide roller 110 has a cantilever shape in which only one side is fixed and supported. In this manner, when only one side of the first guide roller 110 is fixed, the first guide roller 110 can be easily coupled to the lifting mechanism 180 described below. That is, when only one side of the first guide roller 110 is coupled to the lifting frame 181 of the lifting mechanism 180 and the lifting frame 181 is raised, the first guide roller 110 can be easily raised and lowered. To configure the lifting frame 181 in a form in which both sides of the first guide roller 110 are all coupled, the configuration of the lifting frame 181 and the lifting mechanism 180 linked thereto becomes complicated.

[0075] In addition, the other side of the first guide roller 110 needs to be opened at the front for maintenance, etc. Therefore, the other side of the first guide roller 110 is not fixedly coupled to another structure such as a lifting frame 181. However, the other side of the first guide roller 110 may be supported by an auxiliary frame such as a support frame 150 described below.

[0076] The detailed configuration of the first and second guide rollers will be described with reference to FIG.

[0077] The first guide roller 110 and the second guide roller 120 include roller units 111 and 121 that extend across the guide direction to guide the pouch film 1. A shaft S that extends along the extension direction of the roller unit is protrudingly installed at both ends of the center of the roller unit. The shaft S and the roller units 111 and 121 are integrally coupled to each other and can be rotated together by the rotation of the shaft or the rotation of the roller unit. When the shaft is connected to a driving unit such as a motor and rotated, the first guide roller 110 and the second guide roller 120 can be driving rollers. When the shaft is passively rotated by the rotation of the roller units 111 and 121, the first guide roller 110 and the second guide roller 120 are driven rollers. In this embodiment, the first guide roller 110 and the second guide roller 120 are driven rollers. Therefore, as a drive roller (not shown) arranged before the input section I or after the output section O of the pouch film supplying device 100 for secondary batteries of the present invention rotates, the roller portions 111, 121 of the first guide roller and the second guide roller, which are driven rollers, rotate to guide the pouch film 1.

[0078] Bearing units 112 and 122 are installed on both sides of the roller units 111 and 121. In this embodiment, the bearing units 112 and 122 are radial bearing units in which a bearing B is located in a retainer unit R between an outer ring OR and an inner ring IR. A shaft S is inserted into the inner ring IR and can rotate with respect to the outer ring OR. Extension rods are provided protruding from the outer rings of the bearing units 112 and 122 to one and the other sides of the first and second guide rollers, respectively. The outer rings of the bearing units 112 and 122 do not rotate despite the rotation of the roller units. Therefore, the guide rollers are fixedly supported by fixedly installing the extension rods protruding from the outer rings of the bearing units.

[0079] Specifically, a first extension rod 113A protruding from the outer ring OR of the bearing part to one side of the first guide roller 110 may be fixed to an installation wall W (or a fixed frame) or a movable frame (e.g., lift frame 181). Also, a second extension rod 113B protruding from the outer ring of the bearing part to the other side of the first guide roller 110 may be provided. The second extension rod 113B also does not rotate despite the rotation of the roller part. Therefore, by installing an inclination measuring member on the second extension rod 113B, the inclination of the first guide roller 110 can be stably measured.

[0080] The second guide roller 120 may also include a first extension rod 123A and a second extension rod 123B protruding from the outer rings of the bearing parts on both sides of the roller part, similar to the first guide roller 110. A fixing jig 160 is installed at the bottom of the second guide roller 120. The fixing jig 160 has an upward extension part 162 on both sides or one side. As shown in FIG. 2, the second extension rod 123A of the second guide roller 120 is coupled to the upward extension part 162 at the front end of the fixing jig 160. The upward extension part 162 has a coupling groove 163, and the second extension rod 123B of the second guide roller 120 is coupled to the coupling groove 163. The first extension rod 123A of the second guide roller 120 may be coupled to the upward extension part at the rear end of the fixing jig 160 or to the installation wall W.

[0081] 2 and 3, a first inclination measuring member 130A for measuring the up-down inclination is installed on a second extension rod 113B protruding from the other side of the first guide roller 110. As shown in FIG.

[0082] As described above, the first inclination measuring member 130A may be a digital level gauge that includes an inclination sensor or bubbler that measures the degree of inclination (inclination) relative to a reference plane and can easily express the inclination of the measurement target surface by converting it into a numerical value according to the change in the position of the bubble according to the measurement target surface. In order to measure the upward or downward inclination of the second extension rod 113B, for example, a digital level gauge is installed on the upper surface of the second extension rod 113B. In order to stably measure the upward and downward inclination, the first inclination measuring member jig 131A may be first coupled onto the second extension rod 113B, and the first inclination measuring member 130A may be installed on the jig 131A. An installation groove is formed on the lower part of the jig 131A so that it can be mounted on the second extension rod 113B. The shape of the installation groove may be circular, V-shaped, or other shapes to match the shape of the upper surface of the second extension rod 113B.

[0083] For example, the screen of the first inclination measuring member 130A, which is a digital level gauge, displays the upward inclination or downward inclination of the second extension rod 113B (and the roller unit 111). Thus, the up-down inclination of the first guide roller 110 can be grasped in real time. Referring to FIG. 2, the first inclination measuring member 130A can be connected to the monitoring unit 170 by wire or wirelessly. The monitoring unit 170 can be a component included in the control unit 190 that controls the transfer of the pouch film and the lifting mechanism 180 of the first guide roller 110 described later. The monitoring unit 170 can be a computing system capable of wired or wireless communication with a production management system of a factory. In addition, the monitoring unit 170 includes a predetermined display unit, and the up-down inclination of the first guide roller 110 measured by the first inclination measuring member 130A can be displayed on the display unit in real time. In this way, according to the present invention, the degree of bending and the bending tendency of each first guide roller 110 can be quantitatively analyzed by monitoring the up-down inclination of the first guide roller 110 in real time. In addition, if the monitored vertical inclination is outside a set range, the vertical inclination of the plurality of first guide rollers 110 can be adjusted uniformly by adjusting the vertical inclination with the inclination adjustment member. This can prevent the pouch film from meandering in the pouch film supplying device 100. Therefore, defects in the pouch forming section that processes the pouch film 1 supplied from the pouch film supplying device 100 can also be prevented.

[0084] The pouch film supplying device 100 of this embodiment also includes an inclination adjustment member that adjusts the up-down inclination of the first guide roller 110. With reference to Figures 3 and 5, a height adjustment bolt 140A is shown as the up-down inclination adjustment member.

[0085] Particularly, in this embodiment, a support frame 150 is provided to support the other side of the first guide roller 110 and the height adjustment bolt. As shown in FIG. 2, FIG. 3 and FIG. 5, a body part 151 of the support frame 150 is installed under the first guide roller 110 in parallel with the extension direction of the first guide roller 110. The support frame 150 is also a cantilever type frame having one side fixed and supported on the same side as the one side of the first guide roller 110. The other side of the support frame 150 supports the other side of the first guide roller 110, i.e., the second extension rod 113B at the end of the other side of the first guide roller 110. Specifically, the support frame 150 has upward extension parts 152 and 153 bent upward toward the first guide roller 110 at the end of one side and the end of the other side, respectively. The upward extension 152 provided at the end of one side of the support frame 150 is fixedly coupled to the installation wall W or the lift frame 181, like one side of the first guide roller 110. The upward extension 153 provided at the end of the other side of the support frame 150 supports the second extension rod 113B of the first guide roller 110. An installation groove 154 in which the second extension rod 113B of the first guide roller 110 is placed is formed at the upper part of the upward extension 153 at the end of the other side. In this way, the installation groove 154 of the support frame 150 supports the second extension rod 113B, thereby preventing the first guide roller 110 from bending or reducing the degree of bending. The support frame 150 is also a cantilever type structure supported only on one side, but has a greater rigidity than the first guide roller 110 and supports the other side of the first guide roller 110 to distribute the load applied to the first guide roller 110.

[0086] Also, the inclination adjustment member is installed on the other side of the support frame 150. Specifically, the height adjustment bolt 140A extending in the up-down direction through the upward extension 153 at the other end of the support frame 150 may be used as the inclination adjustment member. The height adjustment bolt 140A is installed by penetrating the upward extension 153 at the lower part of the installation groove 154. The upward extension 153 has a hollow inside, and the height adjustment bolt 140A may be inserted into the hollow. Therefore, the body part 142A of the height adjustment bolt 140A is inserted into the hollow. Insertion holes are formed at the upper and lower parts of the upward extension 153. An end of the body part 142A of the height adjustment bolt is exposed through the upper insertion hole. The exposed end of the body part protrudes above the installation groove 154 at the upper part of the upward extension. The second extension rod 113B of the first guide roller 110 is placed and supported on the end of the body part protruding above the installation groove.

[0087] The height adjustment bolt 140A passes through an insertion hole at the bottom of the upward extension 153 and is exposed at the bottom of the upward extension. A head 141A of the height adjustment bolt 140A is located protruding from the bottom of the upward extension. A screw hole is formed in the insertion hole of the upward extension into which the height adjustment bolt 140A is inserted, and the height adjustment bolt 140A and the screw hole can be screwed together. Therefore, the height adjustment bolt 140A can be moved up and down by rotating the height adjustment bolt 140A with respect to the screw hole. When the height adjustment bolt 140A moves up, the second extension rod 113B supported on the upper end of the body of the height adjustment bolt 140A also moves up, and the vertical inclination of the first guide roller 110 is changed. The manner in which the vertical inclination of the first guide roller 110 is changed by adjusting the height adjustment bolt 140A up and down is shown in FIG. 5 by dotted lines and solid lines. For example, if the upward or downward inclination measured by the first inclination measuring member 130A is outside the set range, the upward and downward inclinations of the multiple first guide rollers 110 can be adjusted uniformly within a range in which no meandering occurs by adjusting the upward and downward inclinations with the height adjustment bolt 140A.

[0088] In this case, the monitoring unit 170 monitors the vertical inclination of the first guide roller 110, and if the vertical inclination of the first guide roller 110 falls outside a set range according to the monitoring result, an operator can adjust the height adjustment bolt 140A to adjust the vertical inclination of the first guide roller 110. If necessary, an alarm connected to the monitoring unit 170 can be installed to sound the alarm when the vertical inclination of the first guide roller 110 is abnormal, thereby adjusting the vertical inclination of the first guide roller 110.

[0089] The pouch film supplying device 100 for secondary batteries of this embodiment also includes a lifting mechanism 180 that lifts and lowers the first guide roller 110 .

[0090] An example of the lifting mechanism 180 may include a lifting frame 181 to which one side of at least one of the multiple first guide rollers 110 is fixedly supported, a drive unit that raises and lowers the lifting frame 181, and a lifting guide 183 that extends in the vertical direction and guides the lifting and lowering movement of the lifting frame 181.

[0091] It is not necessary to raise and lower all of the first guide rollers 110, and the travel path of the pouch film between the second guide roller 120 and the first guide roller 110 can be changed by raising and lowering at least one or more first guide rollers 110. In this embodiment, six first guide rollers 110 are installed on a lifting frame 181. The lifting frame 181 is raised and lowered by a driving unit. The driving unit may include a driving source such as a motor (not shown), a ball screw 182 rotated by the driving source, and a screw coupling part that is screw-coupled with the ball screw. The screw coupling part is provided on the lifting frame 181. Such a driving unit using a ball screw mechanism is generally known, so a detailed description will be omitted. Of course, in addition to the ball screw mechanism, another linear movement mechanism may also be adopted.

[0092] For stable lifting and lowering movement, a lifting guide 183 for guiding the lifting and lowering operation is provided. The lifting guide 183 may be installed on the frame F or the installation wall W. A plurality of lifting and lowering guides 183 may be provided. The ball screw 182 may be located in an installation space S formed on the installation wall W. The lifting frame 181 moves up and down along the lifting guide 183 installed on the installation wall W or the frame F.

[0093] Meanwhile, a control unit 190 is connected to the lifting mechanism 180 and controls the lifting and lowering of the lifting frame 181. The control unit 190 may be a PLC control unit that controls the transfer of the pouch film 1. As described above, the control unit 190 may include a monitoring unit 170 connected to an inclination measuring member of the first guide roller 110. In addition, the control unit 190 is connected to equipment of a process before the pouch film input unit I and / or a process after the discharge unit O so as to be able to communicate data with the equipment. In particular, when a problem occurs in a process after the pouch film discharge unit O, for example, in a pouch forming unit, the control unit 190 may adjust the lifting and lowering of the lifting frame 181 to adjust the traveling path of the pouch film 1. For example, when the process after the pouch film discharge part O is interrupted or delayed, the control part 190 raises the lift frame 181 to increase the vertical distance between the first guide roller 110 and the second guide roller 120, thereby increasing the travel path of the pouch film 1 guided between the first guide roller and the second guide roller. This makes it possible to secure the maintenance time or pouch film replacement time in the part after the discharge part O. In addition, since the pouch film supply device 100 can continuously supply and transfer the pouch film 1 despite the maintenance, it is possible to prevent the preceding process from being unnecessarily interrupted due to a failure in the following process. In this way, according to the present invention, it is possible to prevent the work loss in the following process and greatly improve the overall work productivity.

[0094] Second embodiment FIG. 7 is a schematic diagram of a pouch film supplying device for secondary batteries in a second embodiment, FIG. 8 is a schematic diagram of a main part of the pouch film supplying device for secondary batteries in the second embodiment, and FIG. 9 is a schematic diagram showing the left-right inclination adjustment process of the first guide roller.

[0095] The pouch film supplying device 100' of the second embodiment differs from the first embodiment which measures the up-down inclination in that the inclination measuring member installed on the first guide roller 110 measures the left-right inclination of the first guide roller 110. As a result, the configuration of the second inclination adjusting member which adjusts the left-right inclination is different from the first inclination adjusting member which adjusts the up-down inclination.

[0096] Other than that, the configurations of the first guide roller 110, the second guide roller 120, the lifting mechanism 180, etc. are the same as those in the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0097] Since the first guide roller 110 is supported in a cantilever type, the other side of the first guide roller 110, i.e., the second extension rod 113B on the other side, may not only bend downward but also move left or right due to the repeated transport load of the pouches. That is, one side and the other side of the first guide roller 110 are not positioned exactly on a line along the vertical direction, but are inevitably biased left or right. In the second embodiment, the meandering of the pouch film can be prevented by measuring the left or right inclination of the first guide roller 110.

[0098] 7 and 8, a second inclination measuring member 130B for measuring the left-right inclination of the first guide roller 110 is installed on the second extension rod 113B of the first guide roller 110. Unlike the first inclination measuring member 130A for measuring the up-down inclination, the second inclination measuring member is installed on the side of the second extension rod 113B. In addition, for stable inclination measurement, the second inclination measuring member 130B is installed on a second inclination measuring member jig 131B. An installation groove is formed on the lower part of the jig 131B so that it can be mounted on the second extension rod 113B. The shape of the installation groove can be circular, V-shaped, or other shapes to match the side shape of the second extension rod 113B.

[0099] The second inclination measuring member 130B may be a digital level gauge that has a built-in inclination sensor or bubble gauge that measures the degree of inclination (inclination) relative to a reference plane, and can easily represent the inclination of the surface to be measured by quantifying it in response to the change in the position of the bubble depending on the surface to be measured.

[0100] For example, the leftward or rightward inclination of the second extension rod 113B (and the roller unit) is displayed on the screen of the second inclination measuring member 130B, which is a digital level gauge. Thus, the leftward or rightward inclination of the first guide roller 110 can be grasped in real time. Referring to FIG. 7, the second inclination measuring member 130B can be connected to the monitoring unit 170 by wire or wirelessly. The monitoring unit 170 includes a predetermined display unit, and the leftward or rightward inclination of the first guide roller 110 measured by the second inclination measuring member can be displayed on the display unit in real time. In this way, according to the present invention, the leftward or rightward inclination of each first guide roller 110 can be quantitatively analyzed by monitoring the leftward or rightward inclination of the first guide roller 110 in real time. In addition, when the monitored leftward or rightward inclination is out of a set range, the leftward or rightward inclination of the plurality of first guide rollers 110 can be adjusted uniformly by adjusting the leftward or rightward inclination using an inclination adjusting member described later. This can prevent the pouch film from meandering in the pouch film supplying device 100. Therefore, defects in the pouch forming section that processes the pouch film supplied from the pouch film supplying device 100 can also be prevented.

[0101] The pouch film supplying device 100 of this embodiment also includes a left / right inclination adjustment bolt 140B that adjusts the left / right inclination of the first guide roller 110.

[0102] Referring to FIG. 8, an upward extension 153 is provided at the end of the other side of a cantilever type support frame 150, and an installation groove 154 in which the second extension rod 113B of the first guide roller 110 is placed is formed at the top of the upward extension. The left and right inclination adjustment bolt 140B is installed at the other side of the support frame 150. Specifically, the left and right inclination adjustment bolt 140B is installed to extend in the left and right direction through the upward extension side wall 153-1 at the other end of the support frame 150. The left and right inclination adjustment bolt 140B is coupled to the upward extension 153 to support the left side or right side or both the left and right side of the second extension rod 113B. In this embodiment, a pair of left and right inclination adjustment bolts 140B are provided on the left and right of the second extension rod 113B to support both the left and right side of the second extension rod 113B.

[0103] In Fig. 9, a pair of left and right inclination adjustment bolts 140B are screwed to the upward extension side walls 153-1 located on the left and right of the installation groove 154 of the upward extension. The left and right inclination adjustment bolts 140B penetrate the upward extension side walls to support the left and right sides of the first guide roller 110 in the left and right direction, so that the horizontal position of the second extension rod 113B located between the left and right inclination adjustment bolts 140B can be adjusted by changing the screw connection position of the inclination adjustment bolt 140B relative to the upward extension side walls to the left and right. The left and right inclination adjustment bolt 140B is composed of a head 141B and a body 142B, and the head protrudes outside the upward extension.

[0104] The manner in which the left-right inclination of the first guide rollers 110 is changed by the left-right inclination adjusting bolt 140B is shown by dotted and solid lines in Fig. 9. For example, if the left-right inclination measured by the second inclination measuring member 130B is out of a set range, the left-right inclination of the plurality of first guide rollers 110 can be uniformly adjusted to a range in which no meandering occurs by adjusting the left-right inclination with the left-right inclination adjusting bolt 140B.

[0105] In this case, the left and right inclination of the first guide roller 110 is monitored by the monitoring unit 170, and the left and right inclination of the first guide roller 110 can be adjusted by an operator adjusting the left and right inclination adjustment bolt according to the monitoring result.

[0106] Third embodiment FIG. 10 is a schematic diagram of a main part of a pouch film supplying device 100 for secondary batteries according to the third embodiment.

[0107] In the third embodiment, both the up-down inclination measuring member 130A of the first embodiment and the left-right inclination measuring member 130B of the second embodiment are provided. This allows the up-down inclination and left-right inclination of the first guide roller 110 to be measured and monitored by the monitoring unit 170.

[0108] Also, a height adjustment bolt 140A for adjusting the up-down inclination and a left-right inclination adjustment bolt 140B for adjusting the left-right inclination are also provided.

[0109] As a result, when the monitored vertical inclination and horizontal inclination are out of the set range, the vertical, horizontal, and left-right inclinations of the first guide roller 110 can all be adjusted by the height adjustment bolt 140A and the left-right inclination adjustment bolt 140B. Therefore, according to this embodiment, meandering of the first guide roller 110 can be more reliably prevented.

[0110] The present invention has been described in more detail above with reference to the drawings and embodiments, etc. However, the configurations described in the drawings or embodiments, etc. in this specification are merely one embodiment of the present invention and do not fully represent the technical ideas of the present invention, and therefore there may be various equivalents and modifications that can replace them at the time of filing this application. [Explanation of symbols]

[0111] 1: Pouch film 100, 100': Pouch film supply device 110: First guide roller 111: Roller section 112: Bearing section 113A: First extension rod 113B: 2nd extension rod 120: Second guide roller 121: Roller section 122: Bearing section 123A: First extension rod 123B: 2nd extension rod 130A: First inclination measuring member 130B: Second inclination measuring member 131A: First inclination measuring member jig 131B: Second inclination measuring member jig 140A: First tilt adjustment member (height adjustment bolt) 141A: Head 142A: Main body 140B: Second tilt adjustment member (left and right tilt adjustment bolt) 141B: Head 142B: Main body 150: Support frame 151: Support frame body 152: One side upward extension 153: Other side upward extension 153-1: Upward extension side wall 154: Installation groove 160: Fixture 161: Fixture body 162: Other side upward extension 163: Binding groove 170: Monitoring Department 180: Lifting mechanism 181: Lifting frame 182: Ball screw 183: Lifting guide 190: Control unit

Claims

1. a plurality of first guide rollers spaced apart from each other between the pouch film input section and the pouch film discharge section, guiding the pouch film and having one side fixed and supported; A plurality of second guide rollers are disposed between the pouch film input section and the pouch film discharge section and spaced apart from the lower portion of the first guide roller to guide the pouch film; a tilt measuring member provided on the other side of the first guide roller for measuring at least one of the up-down tilt and the left-right tilt of the first guide roller.

2. The pouch film supplying device for secondary batteries as described in claim 1, wherein the pouch film is guided alternately by the first guide roller and the second guide roller to form a zigzag running path between the pouch film input section and the pouch film discharge section.

3. Both sides of the second guide roller are fixed to the lower part of the first guide roller, The pouch film supplying device for a secondary battery according to claim 1 , wherein at least one of the first guide rollers is installed so as to be movable up and down relative to the second guide roller.

4. The first guide roller is A roller portion extending across the guide direction of the pouch film to guide the pouch film; Bearing units are installed on both sides of the roller unit; 2. The pouch film supply device for secondary batteries according to claim 1, further comprising: a first extension rod protruding from the bearing portion to one side of the first guide roller and fixedly supported thereon; and a second extension rod protruding from the other side of the first guide roller.

5. The pouch film supplying device for secondary batteries according to claim 4 , wherein the inclination measuring member is installed on the second extension rod.

6. The pouch film supply device for secondary batteries according to claim 5, wherein the inclination measuring member includes at least one of a first inclination measuring member that measures the up-down inclination of the first guide roller and a second inclination measuring member that measures the left-right inclination of the first guide roller.

7. The apparatus for supplying a pouch film for a secondary battery according to claim 1 , further comprising an inclination adjusting member for adjusting at least one of an up-down inclination and a left-right inclination of the first guide roller.

8. 8. The device for supplying pouch film for a secondary battery according to claim 7, further comprising a support frame installed under the first guide roller in parallel with an extension direction of the first guide roller, one side of which is fixed and supported on the same side as the one side of the first guide roller, and the other side of which supports the other side of the first guide roller.

9. The pouch film supplying device for a secondary battery according to claim 8 , wherein the tilt adjustment member is installed on the other side of the support frame.

10. The other end of the support frame is provided with an upward extension bent upward toward the first guide roller, The pouch film supplying device for a secondary battery according to claim 9 , wherein an installation groove is provided on an upper portion of the upward extension portion, into which an extension rod of the first guide roller is placed.

11. 11. The pouch film supply device for secondary batteries according to claim 10, wherein a height adjustment bolt is installed to support an end portion of the other side of the first guide roller in the vertical direction by penetrating the upward extension portion at the lower part of the installation groove and to adjust the height.

12. The pouch film supply device for secondary batteries according to claim 10, wherein a left-right inclination adjustment bolt is installed through the left and right upward extension side walls of the installation groove to support the end of the other side of the first guide roller in the left-right direction and capable of adjusting the position in the left-right direction.

13. a monitoring unit connected to the inclination measuring member and configured to monitor at least one of an up-down inclination and a left-right inclination of the first guide roller measured by the inclination measuring member; and a tilt adjustment member for adjusting at least one of an up-down tilt and a left-right tilt of the first guide roller, 2. The pouch film supply device for a secondary battery according to claim 1, wherein when the vertical inclination or horizontal inclination of the first guide roller monitored by the monitoring unit falls outside a set range, the inclination adjustment member adjusts at least one of the vertical inclination and horizontal inclination of the first guide roller.

14. a lifting frame to which one side of at least one of the first guide rollers is fixedly supported; A drive unit that raises and lowers the lift frame; A lift guide extending in a vertical direction and guiding the lift frame in a lifting operation, The pouch film supplying device for secondary batteries according to any one of claims 1 to 13, wherein the lifting frame is raised and lowered to change the vertical distance between the first guide roller and the second guide roller, thereby adjusting the length of the pouch film that is stretched and guided between the first guide roller and the second guide roller.

15. 15. The pouch film supply device for secondary batteries according to claim 14, wherein, when a process subsequent to the pouch film discharge section is interrupted or delayed, a control section raises the lift frame to increase the vertical distance between the first guide roller and the second guide roller, thereby increasing the travel path of the pouch film that is guided between the first guide roller and the second guide roller.

Images